If you haven't shopped at Aldi, or it has been awhile:
1. Make sure you have a quarter to unlock a shopping cart. The carts are like luggage carts at the airport. You rent them for a quarter, and you get your quarter back when you return the cart.
2. Take your own bags. Aldi does not provide free bags for your groceries.
3. Aldis accepts debit cards.
4. Aldis does not accept coupons

If you buy something at Aldi you are not please with, they have a double guarantee. If for any reason, you are not 100% satisfied with any product, they will replace the product AND refund your money. More info HERE.